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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "Chris M. Thomasson" Newsgroups: comp.lang.c++,comp.lang.c Subject: Re: Threads across programming languages Date: Fri, 3 May 2024 21:27:28 -0700 Organization: A noiseless patient Spider Lines: 29 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 04 May 2024 06:27:28 +0200 (CEST) Injection-Info: dont-email.me; posting-host="00566bb81b0a3452542610785f934900"; logging-data="1090777"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+NderCCSiR6YsW661w2AmFYzCJCwQEmrs=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:H1coAM2FnNReKs5WUmyDJINh1+s= In-Reply-To: Content-Language: en-US Bytes: 2942 On 5/3/2024 9:00 PM, Bonita Montero wrote: > Am 04.05.2024 um 04:30 schrieb Lawrence D'Oliveiro: >> On Fri, 3 May 2024 09:00:30 +0200, Bonita Montero wrote: >> >>> Am 03.05.2024 um 01:16 schrieb Lawrence D'Oliveiro: >>> >>>> On Thu, 2 May 2024 07:53:21 +0200, Bonita Montero wrote: >>>> >>>>> If you have a stream of individual I/Os and the processing of the I/Os >>>>> takes more time than the time between the I/Os you need threads. >>>> >>>> That makes the CPU the bottleneck. Which is not the case we’re >>>> discussing here. >>> >>> No, the processing beetween the I/O can mostly depend on other I/Os, >>> which is the standard case for server applications. >> >> In that situation, multithreading isn’t going to speed things up. > > Of course if the intervals between the individual I/Os are shorter > than the processing. > Think of some io completion threads going full speed. They do not actually block for hours during a period of heavy load. GQCSEX is returning shit loads of OVERLAPPED io completions and it never blocks for this heavy period in load... Then, thread sync can become a major factor... Ahhh... RCU with database lookups is able to handle HYPER read mostly loads...